[PATCH v3 28/35] x86/bugs: Add attack vector controls for spectre_v1

David Kaplan
2025-01-08T20:25:58Z

Use attack vector controls to determine if spectre_v1 mitigation is
required.

Signed-off-by: David Kaplan <david.kaplan@amd.com>
---
arch/x86/kernel/cpu/bugs.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 9c9299b988d1..41c8a9dad411 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1172,6 +1172,9 @@ static void __init spectre_v1_select_mitigation(void)
{
if (!boot_cpu_has_bug(X86_BUG_SPECTRE_V1) || cpu_mitigations_off())
spectre_v1_mitigation = SPECTRE_V1_MITIGATION_NONE;
+
+ if (!should_mitigate_vuln(X86_BUG_SPECTRE_V1))
+ spectre_v1_mitigation = SPECTRE_V1_MITIGATION_NONE;
}

static void __init spectre_v1_apply_mitigation(void)
--
2.34.1